I'm of the opinion that speycasting from the beach is the most inefficient way to utilize a long rod on our beaches. I believe you must use a two-handed overhead cast with a short shooting head. The long rod will keep the line off our sloped beaches and you will be able to fish through all but the highest incoming tides. And best of all, the shooting head will only need one short backcast letting you clear the driftwood piles, trees and bluffs on our beaches.
I am working on such a setup now.